US3899705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shrink-ring commutator segment assembly
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1973-05-17
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Granted: 1975-08-12
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Expires: 1993-05-17
Abstract
Abstract An electrical commutator component of a dynamoelectric machine consists of a cylindrical assembly of commutator segments secured by a shrink-ring. In order to electrically insulate the shrinkring from the voltage carrying commutator segments, the entire surface of the ring is covered by insulation material prior to being heated and shrunk onto the surface of the commutator segment assembly. The insulation material can be in the form of a band which is wrapped around the ring.
Inventors
- 👤 Werner Heil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:40
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/14; H01R39/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
An electrical commutator component of a dynamoelectric machine comprising a cylindrical assembly of commutator segments, and shrink-ring surrounding and exerting a compressive force on said commutator segment assembly, the entire surface area of said shrink-ring including insulation material thereon having a maximum thickness not exceeding approximately 0.5 mm thereby to render it substantially incompressible and consisting of two layers, the inner layer in actual contact with the surface of the shrink-ring being mica-containing paper and the outer layer being polyimide.
Claim 2
Dependent Claim
80 words
An electrical commutator component of a dynamoelectric machine comprising a cylindrical assembly of commutator segments, and shrink-ring surrounding and exerting a compressive force on said commutator segment assembly, the entire surface area of said shrink-ring including insulation material thereon having a maximum thickness not exceeding approximately 0.5 mm thereby to render it substantially incompressible and consisting of two layers, the inner layer in actual contact with the surface of the shrink-ring being mica-containing paper and the outer layer being polyimide.
Claim 3
Dependent Claim
67 words
An electrical commutator component of a dynamoelectric machine comprising a cylindrical assembly of commutator segments, and a shrink-ring surrounding and exerting a compressive force on said commutator segment assembly, the entire surface area of said shrink-ring including insulation material thereon having a maximum thickness not exceeding approximately 0.5 mm thereby to render it substantially incompressible and comprising three layers, the inner layer being mica or mica-containing paper.
Claim 4
Dependent Claim
67 words
An electrical commutator component of a dynamoelectric machine comprising a cylindrical assembly of commutator segments, and a shrink-ring surrounding and exerting a compressive force on said commutator segment assembly, the entire surface area of said shrink-ring including insulation material thereon having a maximum thickness not exceeding approximately 0.5 mm thereby to render it substantially incompressible and comprising three layers, the inner layer being mica or mica-containing paper.
Claim 5
Dependent Claim
75 words
An electrical commutator component of a dynamoelectric machine comprising a cylindrical assembly of commutator segments, and a shrink-ring surrounding and exerting a compressive force on said commutator segment assembly, the entire surface area of said shrink-ring including insulation material thereon having a maximum thickness not exceeding approximately 0.5 mm thereby to render it substantially incompressible and consisting of three layers, the inner layer being mica or mica-containing paper and the two outer layers being polyimide.
Claim 6
Dependent Claim
75 words
An electrical commutator component of a dynamoelectric machine comprising a cylindrical assembly of commutator segments, and a shrink-ring surrounding and exerting a compressive force on said commutator segment assembly, the entire surface area of said shrink-ring including insulation material thereon having a maximum thickness not exceeding approximately 0.5 mm thereby to render it substantially incompressible and consisting of three layers, the inner layer being mica or mica-containing paper and the two outer layers being polyimide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |